Safety release for power-driven rolls or cutters



March 111 1924. 1,486,310

W. H. 'SUMBLING SAFETY RELEASE FOR POWER DRIVEN ROLLS OR CUTTERS Filed June 15 1921 L/ IN VEN TOR.

y ATTORNEY.

ieaa

5 i t "l. i 3'? m i 7 ti alias and idea WILLZLAEE HENRY S'UJK'IELING, OF TORUI ETTQ, QNEARIO, CANADA.

SAFETY RELEASE FDR PDTVEE-D1ZEVEN ROLLS OE GUTTEBS.

Application filed June 3.5, Serial 1%. 77,850.

T all whom it may concern: tiie rolls or cutters: In other words, the pri- Be it known that l, Ninth-mi HENRY mary pressu e-exerting means when in op- SUMBLING, a subject of the King of Great eration posit y dominates or controls the Britain, of the city of Toronto, county of relationship or said rolls or members, and c0 York, Province of Ontario, Canada, have when out of operation said means do not ininvented certain new and useful lmproveere, by exerting any weight or pressure ments in Safety Releases for PowenDriven against the rolls or members, with the sep- Rolls or Cutters, of which the following is aration thereof.

a specification. l v here the rotary members are geared toas My invention relates to a safety release gethcr, th= range of separating movement for power-driven rolls or cutters, and the may be a sired, that is to say, the separaobject of the invention is to provide means tion [ner may be sufficient to throw them under the control of the operator of the out 0; gear. machine to positively and quickly render it are a pair of standards, preferably s inoperative the means holding a. pair of tubular in form for the major portion of rolls, or cutters, in co-operative relationship th ir length and mounted in each of the so that in case the hand or hands of the operator be caught therebetween,the same may. be sui'iicicntly separated while still rotating to permit the hand or hands to be V in order that they may cowithdrawn before any serious damage can operated, as is common in the art.

be done, and in the following specification I nesting upon. the upper box B in each shall describe a disclosure within myinvenstandard A is a coiled spring G and resting tion relating particularly to wringing maupon the top of each of these springs is a so chines, and what I claim as new will be set presser-bar ll. Positioned within each of forth in the claim forming part of this thestandards A is a box I in which have specification. bearing the trunnions J of the safety-re- Fig. l is aside elevation of a wringing lease device, which comprises levers K machine showing the same constructed to coupled together at their outer ends as by 5 so embody the principle of my invention. means of bar L. (lo-operating with the Fig. 2 is an end elevation of the principal top of each of the standards A. is a screw 2 parts shown in Fig. 1, and Fig. 3 is a horiwhich is preferably threaded through the rental cross-section on the line 3-3, Fig. 2. cap Each these screws has a hand In the drawings, like characters ofreferwheel l, and the lower end of each of the 35 ence refer to the same parts. said screws is suitably coupled to its as- As before set forth, the principle of my sociated box I. invention is disclosed in connection with Gf course the screws 2 are used to regupower-driven wringing machines, though late the'ultimate pressure to be exerted the principle thereof may be utilized in vaagainst the springs G, and upon referring rious types of machines where a pair of particularly to Figs. 1 and 2 it will be obsubstantially parallel rolls, or cutters, opserved that since the levers K are in conerate on the work to change the form or tact with the presser-bar H, the springs state thereof. are held under compression and conse- In the exemplary disclosure within my inquently the rolls D are tightly held together.

vention the rolls are yieldingly held so that in the disclosure made of my invention, the they may utomatically adjust themselves to safety-release device may be shoved away the thickness of the article passing therefrom the operator, or pulled towards him, between, but such automatic adjustment is and when moved sufficiently in either direcnot essential to the broad application of the tion around the trunnions J, the pressure 59 principle of my invention. But it is of the against the bar H will be immediately reessence of the invention that the primary leased with the result that the rolls D may pressure-exerting means which hold the rolls be separated to permit the withdrawal of or cutters in cooperative relationship shall the hand.

he made inoperative when necessary, and When the safety-release device is in dotthat when out of operation the weight thereted position shown in Fig. 2, it will be. ob-

of shall not interfere with the separation of served that by reason of the slot 5 formed the shafts C of the rolls D. ire provided with suitable gear is in the standards A, abundance of room is provided forthe expansion of the springs Gr.

When it is desired to hold the rolls D again under pressure, when my form of safety-release device disclosed is used, the screws 2 must be retracted sufiiciently so as to raise the boxes I far enough to permit the ends 6 of the levers K to be positioned as shown in Figs. 1 and 2 in contact with the bar H. The screws 2 are then operated, and as the boxes I are lowered the levers K move the presser-bar H to compress the springs G.

Upon referring particularly to Figs. 1 and 2 it will be observed that since there is a clear space beneath the boxes I, when the safety-release device is moved out of contact with the bar H, the said device as well as the boxes I, will be supported by the screws 2, and consequently none of the weight of these parts will be carried by the bar H at this time.

My preferred manner of associating the screws 2 each with its box I, is to form in the upper side of each of the said boxes a T-shaped slot 7 thus providing flanges 8 with which engages the head 9 of each screw 2 when the safety-release device occupies the dotted position shown in Fig. 2. It will be observed that one end of the slot '7 is open so as to permit of the ready assembling of the boxes I and screws 2.

' The standards A may be coupled together at each side by any suitable means such as nut-provided tie-rods 10 which are held in the lugs 11 forming part of said standards. 12 is a nut-provided tie-rod to couple the lower ends of the standards A together in any wellknown manner. This tie-r0d may be used to mount the apron l3 thereon.

The ends of the presser bar H, preferably project beyond the standards A, and are provided with suitable means to prevent any considerable longitudinal displacement of said bar; such means may be in the form of pins 14 carried by said bar and which come into contact with the standards A and form stops.

While I have described what I consider to be the best embodiment within my invention it must be understood that the principle may be embodied in other different forms, and I desire not to be limited beyondthe requirements of the prior art and the terms of my claim,

In this disclosure of my invention, it will he observed that since the bar L is directly above the rolls D, in case the operators both hands he caught, it' is possible for him to reach forward with the head and release the safety-release device.

In the exemplary disclosure of my invention, the screws 2 and supports therefor; the boxes I, trunnions J levers K, and bar L form what I call the primary pressureexerting elements, while the presser-bar springs Gr, and the upper pair of boxes B form what I call the secondary pressureexerting elements.

W hat I claim is: V

In combination a frame including end standards; a pair of rolls mountedto have bearing in said standards; a coiled-spring mounted in each of said standards to rest in contact with the upper of said rolls; a resser-bar resting upon said springs and adapted to be held in co-operative relationship to said standards; a box located within each of said standards near the top thereof; a screw associated with each of the said boxes and having threaded connection with the top of each of said standards, and pressure-exerting means journaled at each end in said boxes and normally in disengage able contact with said presser-bar, the whole designed to co-act for the purpose set forth.

WILLIAM HENRY SUMBLING. 

